package Example10.Demo01;

import java.sql.*;
import java.util.Scanner;

public class Demo01 {
    /**
     * 模拟添加用户业务
     */
        public static void main(String[] args)  throws SQLException {
            Statement stmt = null;
            ResultSet re = null;
            Connection conn = null;
            try {
                //1. 注册数据库驱动
                Class.forName("com.mysql.cj.jdbc.Driver");
                //2. 通过DriverManager获取数据库连接
                String url =
                        "jdbc:mysql://localhost:3306/jdbc?serverTimezone=GMT%2B8&useSSL=false";
                String username = "root";//数据库账户
                String password = "123456";
                conn = DriverManager.getConnection(url, username, password);
                //3. 通过Connnection对象获取Statement对象
                stmt = conn.createStatement();
                // 4.使用Statement执行SQL语句
                /**
                 * 终端用户输入用户名 密码 邮箱
                 * 将终端用户的输入添加打到数据库
                 */
                Scanner sc = new Scanner(System.in);
                System.out.println("请输入用户姓名");
                String un = sc.next();
                System.out.println("请输入用户密码");
                String pd = sc.next();
                System.out.println("请输入用户邮箱");
                String em= sc.next();
                String insertSQL ="insert into users(name, password, email) values(?,?,?)";
                PreparedStatement pm = conn.prepareStatement(insertSQL);//对插入sql进行处理
                pm.setString(1, un);//将第一个？绑定成un的值
                pm.setString(2, pd);//将第二个？绑定成pd的值
                pm.setString(3, em);//将第三个？绑定成em的值
                pm.executeUpdate();


                String sql = "select * from users";
                re = stmt.executeQuery(sql);
                //5.显示结果集合
                System.out.println("id   |   name   |  password   |   email    |   birthday  ");
                while (re.next()) {
                    int id = re.getInt("id");
                    String name = re.getString("name");
                    String pswd = re.getString("password");
                    String email = re.getString("email");
                    String birthday = re.getString("birthday");
                    System.out.println(id+"|"+name+"|" +pswd+ "|" +email+"|"+birthday);
                }
            } catch (ClassNotFoundException e) {
                e.printStackTrace();
            }finally {
                if ( re  !=null){
                    try {
                        re.close();
                    }catch (SQLException e){
                        e.printStackTrace();
                    }
                    re = null;
                }
                if (stmt!=null){
                    try {
                        stmt.close();
                    }catch (SQLException e){
                        e.printStackTrace();
                    }
                    stmt = null;
                }
                if (conn!=null){
                    try {
                        conn.close();
                    }catch (SQLException e){
                        e.printStackTrace();
                    }
                    conn = null;
                }
            }
        }
    }
